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学科主题: 物理化学
题名: Catalysis of the Confined Systems
作者: Bao XH(包信和)
会议名称: Sixth Tokyo Conference on Advanced Catalytic Science and Technology & Fifth Asia Pacific Congress on Catalysis
会议日期: 2010-7-18
出版日期: 2010-07-18
会议地点: 日本
通讯作者: 包信和
部门归属: 五室
主办者: 日本化学会
摘要: It is becoming a common understanding that the nano-confinement in catalyst structures pays in some way very important roles in creating active sites and stabilizing the active configurations. In our previous literatures, we have reported a unique effect of the symergetiv confinement between the concave walls of CNTs and the nano-particles insides its channels. It has been demonstrated that some oxidaes, i.e. ferric oxides, in the inner channel of CNT show a distinct decrease of their reduction temperature, compared to those lie on its external surface. The facile reduction of the oxides in the channels effects strikingly on the catalytic reactions, in particular on those driven by redox process. For instance, the CNT encapsulated Rh-Mn and ferric oxide catalysts showed the significant enhancement of the catalytic performances in conversing syngas into C2 oxygenates and liquid oil, respectively. In the present presentation, besides a short introduction on the catalysis modified by the CNT confinement, I will show also one of our recent results, which demonstrates the unique catalysis of selective oxidation by an interface confined ferrous sites on Pt surface. Fe-Containing catalysts are hightly efficient and active in vroad renge of enzyme and homogeneous catalytic processed. The key structural feature in these enzymes and metal complexes relies on two aspects: presence of coordinatively unsaturated Fe(CUF) sites as the active centers and stabiliztion of the unstable or metastable Fe states though confinment in nanospaces, such as proteins and ligands. Preparation of an analogous ensemble in heterogeneous supported catalysts, which accounts for 80% catalytic processes in industrial chemistry , is of great significance. This, however, remains challenging because of the unknown active centers, difficulty of molecular modeling for rational design due to computer capacity for evoled systems, and the reproducible symthesis of empirically derived catalyst formulations.
语种: 中文
内容类型: 会议论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/114124
Appears in Collections:中国科学院大连化学物理研究所_会议论文

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Recommended Citation:
Bao XH. Catalysis of the Confined Systems[C]. 见:Sixth Tokyo Conference on Advanced Catalytic Science and Technology & Fifth Asia Pacific Congress on Catalysis. 日本. 2010-7-18.
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